package com.lewis.system.aop;

import com.alibaba.fastjson.JSON;
import com.lewis.core.annotation.Log;
import com.lewis.core.base.domain.model.LoginUser;
import com.lewis.core.enums.BusinessStatus;
import com.lewis.core.enums.HttpMethod;
import com.lewis.core.utils.ServletUtil;
import com.lewis.core.utils.SpringUtil;
import com.lewis.core.utils.StringUtil;
import com.lewis.core.utils.ip.IpUtil;
import com.lewis.system.manager.AsyncManager;
import com.lewis.system.manager.factory.AsyncFactory;
import com.lewis.system.web.service.TokenService;
import com.lewis.system.entity.SysLogOperational;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;

/**
 * 操作日志记录处理
 *
 * @author Lewis
 */
@Slf4j
@Aspect
@Component
public class LogAspect {

	/**
	 * 配置织入点
	 */
	@Pointcut("@annotation(com.lewis.core.annotation.Log)")
	public void logPointCut() {
	}

	/**
	 * 处理完请求后执行
	 *
	 * @param joinPoint 切点
	 */
	@AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
	public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
		handleLog(joinPoint, null, jsonResult);
	}

	/**
	 * 拦截异常操作
	 *
	 * @param joinPoint 切点
	 * @param e         异常
	 */
	@AfterThrowing(value = "logPointCut()", throwing = "e")
	public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
		handleLog(joinPoint, e, null);
	}

	protected void handleLog(final JoinPoint joinPoint, final Exception e, Object jsonResult) {
		try {
			//用于统计调用耗时
			long startTime = System.currentTimeMillis();

			// 获得注解
			Log controllerLog = getAnnotationLog(joinPoint);
			if (controllerLog == null) {
				return;
			}

			// 获取当前的用户
			LoginUser loginUser = SpringUtil.getBean(TokenService.class).getLoginUser(ServletUtil.getRequest());

			// *========数据库日志=========*//
			SysLogOperational sysLogOperational = new SysLogOperational();
			sysLogOperational.setStatus(BusinessStatus.SUCCESS.ordinal());
			// 请求的地址
			String ip = IpUtil.getIpAddr(ServletUtil.getRequest());
			sysLogOperational.setOperIp(ip);
			// 返回参数
			sysLogOperational.setJsonResult(JSON.toJSONString(jsonResult));

			sysLogOperational.setOperUrl(ServletUtil.getRequest().getRequestURI());
			if (loginUser != null) {
				sysLogOperational.setOperName(loginUser.getUsername());
			}

			if (e != null) {
				sysLogOperational.setStatus(BusinessStatus.FAIL.ordinal());
				sysLogOperational.setErrorMsg(StringUtil.substring(e.getMessage(), 0, 2000));
			}
			// 设置方法名称
			String className = joinPoint.getTarget().getClass().getName();
			String methodName = joinPoint.getSignature().getName();
			sysLogOperational.setMethod(className + "." + methodName + "()");
			// 设置请求方式
			sysLogOperational.setRequestMethod(ServletUtil.getRequest().getMethod());
			// 处理设置注解上的参数
			getControllerMethodDescription(joinPoint, controllerLog, sysLogOperational);
			// 保存数据库
			AsyncManager.me().execute(AsyncFactory.recordOper(sysLogOperational));

			/* 打印信息到控制台 */
			ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
			HttpServletRequest request = Objects.requireNonNull(attributes).getRequest();

			Signature curSignature = joinPoint.getSignature();

			//记录请求
			log.info("*******************************************************************");

			StringBuilder fullUri = new StringBuilder();
			fullUri.append(request.getRequestURI());
			Map<String, String[]> paramMap = request.getParameterMap();
			if (!paramMap.isEmpty())
				fullUri.append("?");
			for (String key : paramMap.keySet()) {
				fullUri.append(key).append("=").append(paramMap.get(key)[0]).append("&");
			}

			log.info(String.format("请求参数：【%s】", fullUri));
			log.info(String.format("客户端ip：【%s】  User-Agent：【%s】 ", IpUtil.getIpAddr(request), request.getHeader("User-Agent")));
			log.info(String.format("调用：【%s】类的【%s】方法", curSignature.getDeclaringTypeName(), curSignature.getName()));
			log.info(String.format("返回参数：【%s】", JSON.toJSONString(jsonResult)));
			log.info(String.format("总耗时(毫秒)：%s", System.currentTimeMillis() - startTime));

		} catch (Exception exp) {
			log.error("异常信息:{}", exp.getMessage());
			exp.printStackTrace();
		} finally {
			log.info("*******************************************************************");
		}
	}

	/**
	 * 获取注解中对方法的描述信息 用于Controller层注解
	 *
	 * @param log          日志
	 * @param operationLog 操作日志
	 */
	public void getControllerMethodDescription(JoinPoint joinPoint, Log log, SysLogOperational operationLog) {
		// 设置action动作
		operationLog.setBusinessType(log.businessType().ordinal());
		// 设置标题
		operationLog.setTitle(log.title());
		// 设置操作人类别
		operationLog.setOperatorType(log.operatorType().ordinal());
		// 是否需要保存request，参数和值
		if (log.isSaveRequestData()) {
			// 获取参数的信息，传入到数据库中。
			setRequestValue(joinPoint, operationLog);
		}
	}

	/**
	 * 获取请求的参数，放到log中
	 *
	 * @param operationLog 操作日志
	 */
	private void setRequestValue(JoinPoint joinPoint, SysLogOperational operationLog) {
		String requestMethod = operationLog.getRequestMethod();
		if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
			String params = argsArrayToString(joinPoint.getArgs());
			operationLog.setOperParam(StringUtil.substring(params, 0, 2000));
		} else {
			Map<?, ?> paramsMap = (Map<?, ?>) ServletUtil.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
			operationLog.setOperParam(StringUtil.substring(paramsMap.toString(), 0, 2000));
		}
	}

	/**
	 * 是否存在注解，如果存在就获取
	 */
	private Log getAnnotationLog(JoinPoint joinPoint) {
		Signature signature = joinPoint.getSignature();
		MethodSignature methodSignature = (MethodSignature) signature;
		Method method = methodSignature.getMethod();

		if (method != null) {
			return method.getAnnotation(Log.class);
		}

		return null;
	}

	/**
	 * 参数拼装
	 */
	private String argsArrayToString(Object[] paramsArray) {
		StringBuilder params = new StringBuilder();
		if (paramsArray != null && paramsArray.length > 0) {
			for (Object o : paramsArray) {
				if (StringUtil.isNotNull(o) && !isFilterObject(o)) {
					Object jsonObj = JSON.toJSON(o);
					params.append(jsonObj.toString()).append(" ");
				}
			}
		}
		return params.toString().trim();
	}

	/**
	 * 判断是否需要过滤的对象。
	 *
	 * @param o 对象信息。
	 * @return 如果是需要过滤的对象，则返回true；否则返回false。
	 */
	@SuppressWarnings("rawtypes")
	public boolean isFilterObject(final Object o) {
		Class<?> clazz = o.getClass();
		if (clazz.isArray()) {
			return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
		} else if (Collection.class.isAssignableFrom(clazz)) {
			Collection collection = (Collection) o;
			for (Object value : collection) {
				return value instanceof MultipartFile;
			}
		} else if (Map.class.isAssignableFrom(clazz)) {
			Map map = (Map) o;
			for (Object value : map.entrySet()) {
				Map.Entry entry = (Map.Entry) value;
				return entry.getValue() instanceof MultipartFile;
			}
		}
		return o instanceof MultipartFile
				|| o instanceof HttpServletRequest
				|| o instanceof HttpServletResponse
				|| o instanceof BindingResult;
	}
}
